Chelsea saw off Slavia Prague at Stamford Bridge on Thursday night to progress, while Arsenal held off Napoli in Naples as Unai Emery further enhanced his reputation as a Europa League specialist.
Arsenal headed to Naples defending a 2-0 first-leg lead, and Alexandre Lacazette’s fine free-kick was enough to see off a limp Napoli performance as the Gunners went through 3-0 on aggregate.
As for Chelsea, they were made to work harder for their win. The Blues has won the first leg 1-0 in Prague, but Slavia threatened an astonishing Stamford Bridge comeback – only to lose 4-3 on the night, and 5-3 on aggregate.
Arsenal’s reward for reaching the last four is a semi-final against Valencia – who knocked out fellow LaLiga club Villarreal – while Maurizio Sarri’s Chelsea will take on Eintracht Frankfurt after the Bundesliga club completed a comeback against the Portuguese giants.